What is Windows PE Peer Caching?

Windows PE Peer Caching was a feature added in Configuration Manager Technical Preview 2. During an OS deployment, it allows a machine being built to pull content from other systems on the local subnet (its peers) as opposed to going across a potentially slow WAN connection. It is quite simply a peer-to-peer network of content providers. This is similar functionality to 1E’s NomadBranch and 2Pint’s BranchCache for OSD Toolkit.